Anyone run a sump on a freshwater tank?

[Delphinus]

Just wondering. Anyone run a sump on a freshwater tank? I almost want to try this, if for no other reason than I want to put a float valve for topoff on my freshwater tank.

How much flow have you ever seen on a freshwater tank? My gravel is a detritus trap and this is another thing I wish I could do something about ... I'm thinking, more flow perhaps, keep the goo and poo from settling on the gravel and get caught by the filters instead...